{"id":15011288547702,"title":"Ultegra 12spd Rim Brake Di2 Groupset","handle":"ultegra-12spd-rim-brake-di2-groupset","description":"

With technology trickling down from flagship Dura-Ace, Shimano's Ultegra R8150 Di2 Groupset is better than it has ever been before. It perfectly balances performance with value, and the components are slick, reliable, and only create a minimal weight penalty compared to Dura-Ace.

Shifting is flawless, and faster than previous iterations, while operating almost silently. This is thanks to Hyperglide+ tooth profiles, meaning that the chainrings and cassette have an improved connection with the chain, essentially improving shifting under load, across the cassette. Adding in a 12th sprocket, progression through the gears is smoother too.

There are plenty of configurations to choose from, including various crank lengths and both mid-compact and compact chainrings, making this groupset a fantastic option for the majority of riders looking to upgrade their bike to an electronic system.

You can also pair the system with most third-party cycling computers, including Garmin and Wahoo, which allow you to monitor gear selection or battery status.

The Groupset comprises of:

ST-R8150 Shifters

NOT wireless - (the required cables and junction box are included in the groupset)
2x12-speed Dual-Control lever
Refined hood for improved ergonomics and aerodynamics
Improved button access

FC-R8100 - HOLLOWTECH II Crank Set - 2x12-speed

Chainring combinations: - 52-36T or 50-34T

CS-R8100 Cassette - 12-speed, 11-30T or 11-34T

11-tooth small cog for optimal efficiency
Optimized “Sweet Spot” Gears for pedalling efficiency
Compatible with 11-speed HG freehub bodies
11-36*T cassettes (CSHG710) available as an option - call for availability

RD-R8150 Rear Derailleur

SHIMANO SHADOW Rear Derailleur
Integrated D-FLY connectivity
12-speed Di2 technology
Compatible with 11-30, 11-34 and 11-36*T cassettes (*available as an option - call for availability)

FD-R8150 Front Derailleur

12-speed Di2 technology
Fast, precise front shifting

BR-R8100 Brakes

Exceptional balance of rigidity, weight and stopping power
Maximum tyre size: 28C

KMC X12 Chain with Quick Link

Shimano Battery, Charging Cable and Electric Wires

This groupset comes complete with a Shimano E-Tube SEIS Di2 battery, charging cable and EW-SD300 E-Tube Di2 Electric Wires.

E-Tube SEIS Di2 Battery, 7.4V Lithium-ion, 3-ports for SD300 wires, internal mount
EW-EC300 Charging Cable,1700mm
EWJC302 - 2 port junction
EW-SD300 E-Tube Di2 Electric Wire, 550mm - left Shifter to cable junction
EW-SD300 E-Tube Di2 Electric Wire, 550mm - right shifter to cable junction
EW-SD300 E-Tube Di2 Electric Wire, 950mm - battery to front mech
EW-SD300 E-Tube Di2 Electric Wire, 1200mm - battery to rear mech
EW-SD300 E-Tube Di2 Electric Wire, 1400mm - battery to junction cable

PLEASE NOTE, THIS GROUPSET DOES NOT CONTAIN:

Bottom Bracket

PLEASE ALSO NOTE: Unlike the disc brake version, the 12s rim brake shifters still use WIRED connections to the battery and derailleurs.

","published_at":"2025-01-08T09:36:24+00:00","created_at":"2025-01-06T13:23:18+00:00","vendor":"Shimano","type":"Groupset","tags":[],"price":115999,"price_min":115999,"price_max":115999,"available":false,"price_varies":false,"compare_at_price":203995,"compare_at_price_min":203995,"compare_at_price_max":203995,"compare_at_price_varies":false,"variants":[{"id":55125086044534,"title":"11-30 / 160 / 50/34t","option1":"11-30","option2":"160","option3":"50/34t","sku":"","requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 160 / 50/34t","public_title":"11-30 / 160 / 50/34t","options":["11-30","160","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556713846,"title":"11-30 / 160 / 52/36t","option1":"11-30","option2":"160","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 160 / 52/36t","public_title":"11-30 / 160 / 52/36t","options":["11-30","160","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556746614,"title":"11-30 / 160 / 46/36t","option1":"11-30","option2":"160","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 160 / 46/36t","public_title":"11-30 / 160 / 46/36t","options":["11-30","160","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556779382,"title":"11-30 / 165 / 50/34t","option1":"11-30","option2":"165","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 165 / 50/34t","public_title":"11-30 / 165 / 50/34t","options":["11-30","165","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556812150,"title":"11-30 / 165 / 52/36t","option1":"11-30","option2":"165","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 165 / 52/36t","public_title":"11-30 / 165 / 52/36t","options":["11-30","165","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556844918,"title":"11-30 / 165 / 46/36t","option1":"11-30","option2":"165","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 165 / 46/36t","public_title":"11-30 / 165 / 46/36t","options":["11-30","165","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556877686,"title":"11-30 / 170 / 50/34t","option1":"11-30","option2":"170","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 170 / 50/34t","public_title":"11-30 / 170 / 50/34t","options":["11-30","170","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556910454,"title":"11-30 / 170 / 52/36t","option1":"11-30","option2":"170","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 170 / 52/36t","public_title":"11-30 / 170 / 52/36t","options":["11-30","170","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556943222,"title":"11-30 / 170 / 46/36t","option1":"11-30","option2":"170","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 170 / 46/36t","public_title":"11-30 / 170 / 46/36t","options":["11-30","170","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129556975990,"title":"11-30 / 172.5 / 50/34t","option1":"11-30","option2":"172.5","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 172.5 / 50/34t","public_title":"11-30 / 172.5 / 50/34t","options":["11-30","172.5","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557008758,"title":"11-30 / 172.5 / 52/36t","option1":"11-30","option2":"172.5","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 172.5 / 52/36t","public_title":"11-30 / 172.5 / 52/36t","options":["11-30","172.5","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557041526,"title":"11-30 / 172.5 / 46/36t","option1":"11-30","option2":"172.5","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 172.5 / 46/36t","public_title":"11-30 / 172.5 / 46/36t","options":["11-30","172.5","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557074294,"title":"11-30 / 175 / 50/34t","option1":"11-30","option2":"175","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 175 / 50/34t","public_title":"11-30 / 175 / 50/34t","options":["11-30","175","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557107062,"title":"11-30 / 175 / 52/36t","option1":"11-30","option2":"175","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 175 / 52/36t","public_title":"11-30 / 175 / 52/36t","options":["11-30","175","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557139830,"title":"11-30 / 175 / 46/36t","option1":"11-30","option2":"175","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-30 / 175 / 46/36t","public_title":"11-30 / 175 / 46/36t","options":["11-30","175","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55125086077302,"title":"11-34 / 160 / 50/34t","option1":"11-34","option2":"160","option3":"50/34t","sku":"","requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 160 / 50/34t","public_title":"11-34 / 160 / 50/34t","options":["11-34","160","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557172598,"title":"11-34 / 160 / 52/36t","option1":"11-34","option2":"160","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 160 / 52/36t","public_title":"11-34 / 160 / 52/36t","options":["11-34","160","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557205366,"title":"11-34 / 160 / 46/36t","option1":"11-34","option2":"160","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 160 / 46/36t","public_title":"11-34 / 160 / 46/36t","options":["11-34","160","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557238134,"title":"11-34 / 165 / 50/34t","option1":"11-34","option2":"165","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 165 / 50/34t","public_title":"11-34 / 165 / 50/34t","options":["11-34","165","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557270902,"title":"11-34 / 165 / 52/36t","option1":"11-34","option2":"165","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 165 / 52/36t","public_title":"11-34 / 165 / 52/36t","options":["11-34","165","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557303670,"title":"11-34 / 165 / 46/36t","option1":"11-34","option2":"165","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 165 / 46/36t","public_title":"11-34 / 165 / 46/36t","options":["11-34","165","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557336438,"title":"11-34 / 170 / 50/34t","option1":"11-34","option2":"170","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 170 / 50/34t","public_title":"11-34 / 170 / 50/34t","options":["11-34","170","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557369206,"title":"11-34 / 170 / 52/36t","option1":"11-34","option2":"170","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 170 / 52/36t","public_title":"11-34 / 170 / 52/36t","options":["11-34","170","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557401974,"title":"11-34 / 170 / 46/36t","option1":"11-34","option2":"170","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 170 / 46/36t","public_title":"11-34 / 170 / 46/36t","options":["11-34","170","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557434742,"title":"11-34 / 172.5 / 50/34t","option1":"11-34","option2":"172.5","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 172.5 / 50/34t","public_title":"11-34 / 172.5 / 50/34t","options":["11-34","172.5","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557467510,"title":"11-34 / 172.5 / 52/36t","option1":"11-34","option2":"172.5","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 172.5 / 52/36t","public_title":"11-34 / 172.5 / 52/36t","options":["11-34","172.5","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557500278,"title":"11-34 / 172.5 / 46/36t","option1":"11-34","option2":"172.5","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 172.5 / 46/36t","public_title":"11-34 / 172.5 / 46/36t","options":["11-34","172.5","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557533046,"title":"11-34 / 175 / 50/34t","option1":"11-34","option2":"175","option3":"50/34t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 175 / 50/34t","public_title":"11-34 / 175 / 50/34t","options":["11-34","175","50/34t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557565814,"title":"11-34 / 175 / 52/36t","option1":"11-34","option2":"175","option3":"52/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 175 / 52/36t","public_title":"11-34 / 175 / 52/36t","options":["11-34","175","52/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":55129557598582,"title":"11-34 / 175 / 46/36t","option1":"11-34","option2":"175","option3":"46/36t","sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Ultegra 12spd Rim Brake Di2 Groupset - 11-34 / 175 / 46/36t","public_title":"11-34 / 175 / 46/36t","options":["11-34","175","46/36t"],"price":115999,"weight":0,"compare_at_price":203995,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["//www.saintpiranservicecourse.com/cdn/shop/files/saint-piran-service-course-ultegra-12spd-rim-brake-di2-groupset-73130130669942.jpg?v=1736241442"],"featured_image":"//www.saintpiranservicecourse.com/cdn/shop/files/saint-piran-service-course-ultegra-12spd-rim-brake-di2-groupset-73130130669942.jpg?v=1736241442","options":["Cassette","Crank Length","Chainring Size"],"media":[{"alt":"Saint Piran Service Course Ultegra 12spd Rim Brake Di2 Groupset","id":63936699433334,"position":1,"preview_image":{"aspect_ratio":1.0,"height":665,"width":665,"src":"//www.saintpiranservicecourse.com/cdn/shop/files/saint-piran-service-course-ultegra-12spd-rim-brake-di2-groupset-73130130669942.jpg?v=1736241442"},"aspect_ratio":1.0,"height":665,"media_type":"image","src":"//www.saintpiranservicecourse.com/cdn/shop/files/saint-piran-service-course-ultegra-12spd-rim-brake-di2-groupset-73130130669942.jpg?v=1736241442","width":665}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"